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2000-07-26
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38 lines
Short: Ver1.1 CTB
Author: sq8ipu@ariadna.pl (Andrzej Gazda)
Uploader: sq8ipu@ariadna.pl (Andrzej Gazda)
Type: hard/misc
this is the next and the last version of a program
for setting switches, frequencies and CTB.
CTB is a number which says how to set switches in
modulators and alternators used for catv.
e.x. for a frequency of channel K-10, 207.25, CTB
figures out at 0984, after converting it we got 4890.
We count it from an exuation:
where Fn is a carrying frequency of a channel (video)
Fn + A
----------- - C = CTB
B
and for such CTB (=0984) we should set the switches
like this (counted in binary system):
CTB=| 4 | 8 | 9 | 0 |
------------------------------------------------------
| |1 2 4 8|1 2 4 8|1 2 4 8|1 2 4 8| |
| |-------|-------|-------|-------| |
|OFF |0 0 0 0 0 0 | 0 0 0 0 0 0| |
|ON | 0 0|0 0 | |
| -------------------------------
| switch 1 | switch 2 |
Working in cable TV I have made my live easier with this
little program. If it would be helpful to you, too - send
me an e-mail:
sq8ipu@ariadna.pl